Effect of the nature of organophosphorous acid moiety on co-extraction of U(VI) and mineral acid from aqueous solutions using D2EHPA, PC88A and Cyanex 272

被引：21

作者：

Das, Diptendu ^{[1
]}

Juvekar, V. A. ^{[1
]}

Rupawate, V. H. ^{[2
]}

Ramprasad, K. ^{[3
]}

Bhattacharya, R. ^{[3
]}

机构：

[1] Indian Inst Technol, Dept Chem Engn, Bombay 400076, Maharashtra, India

[2] Bhabha Atom Res Ctr, Uranium Extract Div, Bombay 400085, Maharashtra, India

[3] Atom Energy Regulatory Board, Bombay, Maharashtra, India

来源：

HYDROMETALLURGY | 2015年 / 152卷

关键词：

Co-extraction; U(VI); D2EHPA; PC88A; Cyanex; 272; SOLVENT-EXTRACTION; URANIUM(VI); PHOSPHATE; SEPARATION; MECHANISM; SULFATE; TBP;

D O I：

10.1016/j.hydromet.2014.12.018

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effect of organophosphorous moieties of three acid ligands, D2EHPA, PC88A and Cyanex 272, dissolved in light liquid paraffin, on extraction of U(VI) and mineral acid was studied using the Bulk-Liquid Membrane (BLM) technique. A kinetic model was developed to predict the concentration of acid and U(VI) in the feed, organic and the strip phases during extraction. Acid extraction by complexing ligands was found to be significant. The extraction of U(VI) by these three acidic ligands in different mineral acids followed the order HNO3 > HCl > H2SO4. The distribution coefficient for acid and U(VI) extraction increased with increase in '-OR' moieties in the acid ligands i.e. in the order D2EHPA > PC88A > Cyanex 272. The suitability of a ligand for liquid emulsion membrane (LEM) application depends upon the ratio of rates of extraction of U(VI) and acid (HNO3). The study showed that the ratios are in the order D2EHPA > PC88A > Cyanex 272. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：129 / 138

页数：10

共 23 条

[1]

Ali HA, 2012, 2012 22ND INTERNATIONAL CONFERENCE ON COMPUTER THEORY AND APPLICATIONS (ICCTA), P2, DOI 10.1109/ICCTA.2012.6523539

[2] Effect of sulfate, carbonate, and phosphate on the uranium(VI) sorption behavior onto bentonite [J].

Bachmaf, S. ;

Planer-Friedrich, B. ;

Merkel, B. J. .

RADIOCHIMICA ACTA, 2008, 96 (06) :359-366

[3] Third phase formation in the extraction of inorganic acids by TBP in n-octane [J].

Chiarizia, Renato ;

Briand, Alexandra .

SOLVENT EXTRACTION AND ION EXCHANGE, 2007, 25 (03) :351-371

[4] SOLVENT EXTRACTION WITH ALKYL AMINES [J].

COLEMAN, CF ;

BROWN, KB ;

MOORE, JG ;

CROUSE, DJ .

INDUSTRIAL AND ENGINEERING CHEMISTRY, 1958, 50 (12) :1756-1762

[5]

Das Diptendu, 2015, PROBLEM ASS IN PRESS

[6] Studies on the Separation and Recovery of Thorium from Nitric Acid Medium using (2-ethyl hexyl) Phosphonic Acid, Mono (2-ethyl hexyl) Ester (PC88A)/N-Dodecane as Extractant System [J].

Dinkar, A. K. ;

Singh, Suman Kumar ;

Tripathi, S. C. ;

Verma, R. ;

Reddy, A. V. R. .

SEPARATION SCIENCE AND TECHNOLOGY, 2012, 47 (12) :1748-1753

[7] Equilibrium and mechanism of samarium extraction from chloride medium using sodium salt of CYANEX 272 [J].

El-Hefny, N. E. ;

El-Nadi, Y. A. ;

Daoud, J. A. .

SEPARATION AND PURIFICATION TECHNOLOGY, 2010, 75 (03) :310-315

[8] Solvent extraction in hydrometallurgy: the role of organophosphorus extractants [J].

Flett, DS .

JOURNAL OF ORGANOMETALLIC CHEMISTRY, 2005, 690 (10) :2426-2438

[9] The uranium(VI) extraction mechanism of D2EHPA-TOPO from a wet process phosphoric acid [J].

Girgin, S ;

Acarkan, N ;

Sirkeci, AA .

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, 2002, 251 (02) :263-271

[10]

Gregory Choppin R, 2004, SOLVENT EXTRACTION P, P136

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